[Rush17]

Most players don't check 3 queens in this spot when it's HU. You don't have to have a low yet (this is the hand/draw that he probably figures you to have) and checking here would be really weak on his part. I would bet your hand for value. See what he does. If he just calls and you catch another baby on 6th, you can bet again with your 2-way draw. The good thing is, if you bet 5th, at least you'll be in position on 6th street.